<template>
    <div>
        <!--面包屑-->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>分类参数</el-breadcrumb-item>
        </el-breadcrumb>
        <!---卡片视图------>
        <el-card>
            <!---警告--->
            <el-alert title="注意：只允许为第三级分类设置相关参数！" type="warning" :closable="false" show-icon></el-alert>
            <el-row class="cat_opt">
                <el-col>
                    <span>选择商品分类：</span>
                    <el-cascader expand-trigger="hover" v-model="selectdCateKeys" :options="cateList" :props="cateProps" @change="handleChange"></el-cascader>      
                    <el-tabs v-model="activeName" @tab-click="handleTabClick">
                        <!--添加动态参数-->
                        <el-tab-pane label="动态参数" name="many">
                            <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDdialogVisible=true">添加参数</el-button>
                            <el-table :data="manyTableData" border script>
                                <el-table-column type="expand">
                                    <template slot-scope="scope">
                                        <el-tag closable v-for="(item,i) in scope.row.attr_vals" :key="i" @close="handleClose(i,scope.row)">
                                            {{item}}
                                        </el-tag>
                                        <!---输入文本框---->
                                        <el-input class="input-new-tag" v-if="scope.row.inputVisible" v-model="scope.row.inputValue"
                                          ref="saveTagInput" size="small"  @keyup.enter.native="handleInputConfirm"
                                          @blur="handleInputConfirm(scope.row)">
                                        </el-input>
                                        <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                                    </template>
                                </el-table-column>
                                <el-table-column type="index"></el-table-column>
                                <el-table-column label="参数名称" prop="attr_name"></el-table-column>
                                <el-table-column label="操作">
                                    <template slot-scope="scope">
                                        <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                                        <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除</el-button>
                                    </template>
                                </el-table-column>
                            </el-table>
                        </el-tab-pane>
                        <!--添加静态属性-->
                        <el-tab-pane label="静态属性" name="only">
                            <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDdialogVisible=true">添加属性</el-button>
                            <el-table :data="onlyTableData" border script>
                                <el-table-column type="expand">
                                    <template slot-scope="scope">
                                        <el-tag closable v-for="(item,i) in scope.row.attr_vals" :key="i" @close="handleClose(i,scope.row)">
                                            {{item}}
                                        </el-tag>
                                        <!---输入文本框---->
                                        <el-input class="input-new-tag" v-if="scope.row.inputVisible" v-model="scope.row.inputValue"
                                          ref="saveTagInput" size="small"  @keyup.enter.native="handleInputConfirm"
                                          @blur="handleInputConfirm(scope.row)">
                                        </el-input>
                                        <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                                    </template>
                                </el-table-column>
                                <el-table-column type="index"></el-table-column>
                                <el-table-column label="属性名称" prop="attr_name"></el-table-column>
                                <el-table-column label="操作">
                                    <template slot-scope="scope">
                                        <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                                        <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除</el-button>
                                    </template>
                                </el-table-column>
                            </el-table>
                        </el-tab-pane>                        
                    </el-tabs>              
                </el-col>
            </el-row>
        </el-card>
        <!--添加参数对话框--->
        <el-dialog :title="'添加'+titleText" :visible.sync="addDdialogVisible" width="50%" @close="addDialogClosed">
          <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
              <el-form-item :label="titleText" prop="attr_name">
                  <el-input v-model="addForm.attr_name"></el-input>
              </el-form-item>
          </el-form>
          <span slot="footer" class="dialog-footer">
            <el-button @click="addDdialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="addParams">确 定</el-button>
          </span>
        </el-dialog>
        <!--修改参数对话框--->
        <el-dialog :title="'修改'+titleText" :visible.sync="editDdialogVisible" width="50%" @close="editDialogClosed">
          <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
              <el-form-item :label="titleText" prop="attr_name">
                  <el-input v-model="editForm.attr_name"></el-input>
              </el-form-item>
          </el-form>
          <span slot="footer" class="dialog-footer">
            <el-button @click="editDdialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="editParams">确 定</el-button>
          </span>
        </el-dialog>
    </div>
</template>
<script>
    export default{
        data(){
            return{
                cateList:[],
                cateProps:{
                    value:'cat_id',
                    label:'cat_name',
                    children:'children'
                },
                selectdCateKeys:[],
                activeName:"many",
                //动态参数
                manyTableData:[],
                onlyTableData:[],
                addDdialogVisible:false,
                addForm:{
                    attr_name:''
                },
                addFormRules:{
                    attr_name:[
                      {required:true,message:"请输入参数名称",trigger:'blur'}
                    ]
                },
                editDdialogVisible:false,
                editForm:{

                },
                editFormRules:{
                    attr_name:[
                      {required:true,message:"请输入参数名称",trigger:'blur'}
                    ]
                },
                inputVisible:false,
                inputValue:''
            }
        },
        created(){
            this.getCateList()
        },
        methods:{
            async getCateList(){
                const{data:res} = await this.$http.get('categories')
                 if(res.meta.status !== 200){
                     return this.$message.error('获取失败')
                }
                this.cateList = res.data
                
            },
            handleChange(){                
               this.getParamsData()
            },
            //tab页签点击事件
            handleTabClick(){
               this.getParamsData()
            },
            //获取参数的列表数据
            async getParamsData(){
                if(this.selectdCateKeys.length !== 3){
                    this.selectdCateKeys = []
                    this.manyTableData = []
                    this.onlyTableData = []
                    return
                }                 
                //根据所选分类的ID，和当前所处的面板，获取对应的参数
                const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:this.activeName}})
                if(res.meta.status !== 200){
                    return this.$message.error("获取失败")
                }
                res.data.forEach(item=>{
                    item.attr_vals = item.attr_vals ?
                    item.attr_vals = item.attr_vals.split(' '):[]
                    item.inputVisible = false
                    item.inputValue=''
                })
                console.log(res.data)
                this.$message.success("获取成功")
                if(this.activeName === 'many'){
                    this.manyTableData = res.data
                }else{
                    this.onlyTableData = res.data
                }
                

            },
            addDialogClosed(){
                this.$refs.addFormRef.resetFields()
            },
            addParams() {
                this.$refs.addFormRef.validate(async valid=>{
                    if(!valid)return
                    const{data:res}=await this.$http.post(`categories/${this.cateId}/attributes`,
                    {   attr_name:this.addForm.attr_name,
                        attr_sel:this.activeName
                    })
                    if(res.meta.status !== 201){
                        return this.$message.error("添加参数失败")
                    }
                    this.$message.success('添加成功')
                    this.addDdialogVisible = false
                    this.getParamsData()
                })
            },
            editDialogClosed(){
                this.$refs.editFormRef.resetFields()
            },
            editParams(){
                this.$refs.editFormRef.validate(async valid=>{
                    if(!valid) return
                    const {data:res}=await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,{
                       attr_name:this.editForm.attr_name,
                       attr_sel:this.activeName
                    })
                    if(res.meta.status !== 200){
                        return this.$message.error('修改参数失败')
                    }
                    this.$message.success('修改参数成功')
                    this.getParamsData()
                    this.editDdialogVisible = false
                })
            },
            async showEditDialog(attr_id){
                const{data:res}=await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`,{
                  params:{attr_sel:this.activeName}
                })
                if(res.meta.status !== 200){
                    return this.$message.error('获取失败')
                }
                this.editForm = res.data
                this.editDdialogVisible = true
            },
            async removeParams(attr_id){
                const confirmResult = await this.$confirm(
                '此操作将永久删除该参数, 是否继续?', 
                '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                  }).catch(err=>err) 
                if(confirmResult !== 'confirm'){
                    return this.$message.info('取消删除')
                }
                const{data:res}= await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)
                if(res.meta.status !== 200){
                    return this.$message.error('删除参数失败')
                }
                this.$message.success('删除参数成功')
                this.getParamsData()
            },
            handleInputConfirm(row){
                if(row.inputValue.trim().length === 0){
                    row.inputValue = ''
                    row.inputVisible = false
                    return
                }
                row.attr_vals.push(row.inputValue.trim())
                row.inputValue = ''
                row.inputVisible = false
                this.saveAttrVals(row)
               
                
            },
            async saveAttrVals(row){
                const {data:res}=await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,
                {
                    attr_name:row.attr_name,
                    attr_sel:row.attr_sel,
                    attr_vals:row.attr_vals.join(' ')
                }
                )
                if(res.meta.status !== 200){
                    return this.$message.error('修改参数项失败')
                }
                this.$message.success('修改参数项成功')
            },
            showInput(row){
                row.inputVisible = true
                this.$nextTick(_ => {
                    this.$refs.saveTagInput.$refs.input.focus();
                });
            },
            //删除参数可选项
            handleClose(i,row){
                row.attr_vals.splice(i,1)
                this.saveAttrVals(row)
            }
            
        },
        computed:{
            isBtnDisabled(){
                if(this.selectdCateKeys.length!==3){
                    return true
                }
                return false
            },
            //当前选中的分类ID
            cateId(){
                if(this.selectdCateKeys.length===3){
                    return this.selectdCateKeys[2]
                }
                return null
            },
            titleText(){
                if(this.activeName === 'many'){
                    return '动态参数'
                }
                return '静态属性'
            }
        }
        
    }
</script>
<style lang="less" scoped>
.cat_opt{
    margin:15px 0;
}
.el-cascader{
    height:200px;
}
.el-cascader-menu {
  height: 300px;
}
.el-tag{
    margin-right:10px;
}
.input-new-tag{
    width:150px;
}
</style>